Improvement in looms



4Sheets--SheetL .H. D. DAVIS.

WITNESSES.

., 4Sheets--Sheet3.

H. D. DAVIS.

Looms.

Patented June 16, 1874.

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4 Sheets--Sheet 4.

H. D. DAVIS.

Looms.

,Jj Patented June I6, 1874.

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UNITED STATES PATENT OFFICE.

HILAS D. DAVIS, OF NORTH ANDOVER, MASSACHUSETTS, ASSIGNOR TO GEORGE L.DAVIS, JOHN A. WILEY, JOSEPH M. STONE, GEORGE G. DAVIS, JOSEPHYH. STONE,AND JAMES H. DAVIS, OF SAME PLACE.

IMPROVEMENT IN LOOMS.

Specication forming part of Letters Patent No. 151,961, dated June 16,1874; application filed August 16, 1873.

To all whom It may concern:

Be it known that I, HILAs D. DAvIs, of North Andover, in the county ofEssex and State of Massachusetts, have invented certain Improvements inLooms, of which the following is a specification:

My invention relates mainly to modifications in the construction of themechanism for operating the heddles in a fancy-loom, so called, and forthis reason it is thought preferable to describe the mechanism andtherein point out the features of invention that are believed to be newwithout making a preliminary statement of the same.

In the drawings only so much of the loom is represented as serves toshow the application of my several improvements to it.

Figure l is a plan. Fig. 2 is a side elevation parallel to the heddles.Fig. 3 is a sectional elevation parallel to Fig. 2. Fig. 4 is anelevation at a right angle to Fig. 2; and Figs. 5, 6, 7, and 8 aredetached views of some ofthe parts which will be referred to in thedescription.

A is the frame of the loom; B B, the leaves of heddles; C O, Snc., thecords upon which they are mounted, which are led over pulleys above andbelow in the usual way, and are attached to the sheaves D D, Snc., asshown. E E, &c., are the jacks, to the upper and lower ends of which thecords C( C are attached, and are also attached to the sheaves D D, Ste.The sheaves D are made with two arcs or semi-circumferences havingdifferent diameters. The several cords C O', which are attached to the jacks E, are attached to the smaller diameters of the sheaves, which areall of the same size, but the larger diameters of the same vary in size,being graduated to give an amount ofmovement to the heddle correspondingto its position in the shed, so that it shall be operated evenly in amanner well understood. The sheaves Dare made in this manner, so as notto occupyT a greater thickness than that of a leaf of the heddles; butthey might be made-in the form of bent levers with the two arms of eachof a length equal to the radiuses of the two diameters of the sheaves,to which the several cords could be attached in the same way and producethe same graduated movement of the heddles. F F1 are the lifter anddepresser, which slide up and down upon the guide-rods F2 simultaneouslyin op posite directions by means of the rocking shaft H, to the two armsH1 of which they are connected by the connecting-rods H2. The rockingshaft H receives its motion from the crank I upon the lay-shaft andconnecting-rod I', or in any other suitable manner. The several jacks Eare made of small bars of iron with an enlarged part, E', in the middle,which forms a shoulder above and below it, against which the lifter anddepresser act as eveners to bring the jacks to a central posi-v tionwhen the lifter and depresser approach each other. Each jack is alsoprovided with two notches, e e, upon opposite sides near the shoulders,as shown, by which the jack is connected with the lifter or depresser bythe latches G G, which work in the lifter and depresser, and embrace thejacks, as is shown in Fig. 5. The jacks E work through vertical mortisesin the lifter and depresser, as shown, which thus form guides for thejacks and keep them in their proper positions. They also work throughmortises in the latches, which mortises are somewhat longer than thewidth of the jack, so that the latch when moved in one direction willleave lthe notch e free, and when moved in the other direction willengage with it. Both of the latches are made to slide loosely upon thevertical arms of the bars J, by which the latches are moved in and out,and as the notches e in the jacks are upon opposite edges ot' the same,it follows that when one of the latches is engaged with its jack, theother is disengaged, as is usual in fancylooms working with a closedshed,7 so called, in which all the lea-ves of heddles are either movedup or down at every pick. The bars or guides J slide horizontally insuitable bearings in the framing, and in connection with each one ofthem, and by its side, is another slide, K, a part of which extends aconsiderable distance below the` other, and works in connection with theshort balance-lever L, the ends of which work in suitable .notches orgabs in the slides J and K, as isv shown in e israel Fig. 3, whichcauses them to move simultaneously in opposite directions. Each of theslides J and K also has upon its upper side a gab or notch in which thepattern-levers M work', which are mounted upon the vibrating fulcrum M1,and against the upper ends of which the rollers O of the pattern-chainwork, asis shown in Fig. 3, and thus push in or draw outward the latchesG G- both by a positive motion under control of the patternchain.

rlhe pattern-chain O and its mountings are made and operated in theusual way, as is shown, excepting that each of the rollers or bolls O,is made with two sizes or diameters, corresponding to its twopattern-levers M, and that the circumference of the large part isrounded or sharpened to an edge to receive the edge of thepattern-lever, the surface ot' which is hollowed to tit it. The purposeof this is to prevent the pattern-lever from getting oft' from its bollslaterally, and interfering with the next one, for the reason t-hat asthere are twice as many pattern-levers as are usual in the same space,there being two for each leafofheddles and jack, they are made thinnerthan usual, and placed closer together. The bolls O, otl thepattern-chain, are all made alike, with a large and small diameter, asshown, so that in making up the chain it is only necessary to put thelarge diameter either to the right or left, according to the directionthat the heddle is required to be sprung. The circumferences of thebolls may obviously be hollowed, and the faces ofthe pattern-levers madeto match them, and produce the same result as the construction shown.rlhe chain-wheel U is turned by a ratchet and pawl, and held by a detentin any ofthe usual ways, one mode being shown in the drawing, whenthe'movement is derived from the rocking-shaft H by the system of rodsand levers represented; but other devices might obviously be usedinstead. rlhe axis of the pattern-levers M is made to vibrate at theproper time a short distance toward and from the pattern-chain tooperate the latches Gr, while the pattern-chain is at rest, by a mode ofoperation which has been already set forth and claimed in Letters Patentwhich have been already granted to me. ln this case the fulcrum M1 ismounted upon the ends of two rocker-arms, M2, attached to therockingshaft M3, which, through the arm M4, rod AM5, and lever M6,receives a proper reciprocating niotion from the arm N, which revolvesonce at every pick.

Figs. 6, 7, and S represent my improved mode of constructing thebearings for the yarn-beam.

A represents a part of the frame. l is the cap over the journal of theyarn-beam, which is hinged to the frame at l, so as to swing up. Theouter end of the cap is held down by the swinging stirrup Q, which isalso jointed to the frame, as shown, and is provided with a set-screw,It, by which the cap l? is held rmly to its seat. The cap is alsoprovided with a movable box, S, which, by the screws shown, can be setup as the bearing wears, so that the yarn-beam can, at all times, beheldrigidly and firm, and, by loosen ing the set-screw R only, the bearingscan be opened, and the yarn-beam removed and replaced with greatconvenience.

The several improvements may obviously be lnodied in form to adapt themto the Various constructions of looms to which they might be applied,and still operate upon the same principle; but the structure shown anddescribed clearly sets forth their nature and mode of operation.

As regards the principle of working the heddlesby means of compoundsheaves of graduated diameters, that is not broadly new, as theprinciple is set forth and claimed in the Letters Patent, granted to me,No. 110,904, but in a diiferent form. In that case both sizes oftheeireumfbrences of the sheaves were not in the saine plane, but side byside, and, therefore, required a much greater space for each sheave, sothat the sheaves had to be arranged iu two rows to get them into thesame vspace occupied by the heddles-a difficulty which this mode ofarrangement avoids.

l claiml. The graduated duplex vsheaves D, each having its twocircumferel'ices in the same plane, in combination with the eords,leaves of heddles, and jacks, when arranged to opcrate substantially asdescribed.

2. The latches G Cr, in combination with the lifter, and depresser, andjack, constructed and opci ating substantially as described.

3. rlhe combination of the latches G Gr and the devices J K L, or theirequivalents, for operating the saine simultaneously, with twopattern-levers and a double-pattern mechanism, by which the latches areworked in both directions by a positive motion, substantially asdescribed.

4. rlhe double-faced pattern rollers or bolls, each in combination withtwo pattern-levers, for operating' the latches of the jacks,substantially as described.

5. rlhe pattern-roller, provided with amatched face, in combination withthe patternlever, having a corresponding face, substantially asdescribed.

(i. rlhe swinging cap l), provided with the adjustable box s, incombination with the stirrup Q, provided with lneans for clamping thecap, substantially as described.

Executed at Boston this 11th day of August, 187 3.

IillLAS D. DAVIS.

`\\ritnesses:

N. J. LOMBARD, G. F. SoUTnAc.

